Thursday is expected to reach 32 C with a humidex of 40 as a week-old heat warning remained in effect.
But a predicted low of 16 C Thursday night ushers in what’s expected to be slightly cooler and less humid air Friday, Environment and Climate Change Canada said.
Wind becomes northwest at 20 km/h Thursday morning with mixed skies clearing early in the afternoon. The UV index is 7 or high.
Three emergency cooling centres remain open Thursday to provide relief from the heat to residents in need, the City of Ottawa said.
Hours are 11 a.m. to 7 p.m. at the Sports Hall of Fame at Ottawa City Hall, 110 Laurier Avenue West, the Plant Recreation Centre at 930 Somerset Street West and the Overbrook Community Centre at 33 Quill Street.
Friday is expected to reach 25 C with a humidex of 27 and a UV index of 8 or very high.
The forecast for Friday night is cloudy with a 40 per cent chance of showers and a low of 14 C.
Saturday is expected to be cloudy with a 60 per cent chance of showers, day and night, a high of 22 C and a low of 18 C.
There’s a 40 per cent chance of showers Sunday, again day and night, with a high of 26 C and low of 20 C.
A mix of sun and cloud is expected Monday with a 40 per cent chance of showers, high of 28 C and low of 16 C.
“Normals” for this time of year are highs of 23 C and lows of 13 C.
Sunrise is at 6:17 a.m. and sunset is at 7:51 p.m.